CN103701407B

CN103701407B - Small-sized sealant filling photovoltaic junction box

Info

Publication number: CN103701407B
Application number: CN201310576482.0A
Authority: CN
Inventors: 彭祁军; 李艳群
Original assignee: ZHEJIANG XINHUI OPTOELECTRONIC CO Ltd
Current assignee: Zhejiang Zhengtai Xinhui Photovoltaic Co ltd
Priority date: 2013-11-16
Filing date: 2013-11-16
Publication date: 2016-06-08
Anticipated expiration: 2033-11-16
Also published as: CN103701407A

Abstract

A kind of small-sized sealant filling photovoltaic junction box of disclosure, including the base mutually covered and upper cover, base plate is installed in base, base plate is provided with terminal, terminal is provided with diode, the Line pressing buckle that photovoltaic cable is passed through in base is connected with terminal, and filling above base plate in base has fluid sealant. The most hot spot of the present invention is not directly contacted with solar energy backboard, and base bottom offers convection cavity, and base end face forms difference in height with base plate, has above covered air vent, good heat dissipation effect; Metalwork has been covered with box body inner chamber, and the area of dissipation after encapsulating is big, uniform heat distribution; Base periphery is bent to form coaming plate, and forms cavity by coaming plate, accelerates again heat radiation while reducing encapsulating amount.

Description

Small-sized sealant filling photovoltaic junction box

Technical field

The present invention relates to field of photovoltaic power generation, particularly relate to a kind of small-sized sealant filling photovoltaic junction box being applied in photovoltaic generating system.

Background technology

In the electric connection technology of photovoltaic generating system, photovoltaic junction box is generally adopted to realize the electrical connection between photovoltaic module and inverter. Owing to the application scenario of photovoltaic junction box is usually outdoor environment, therefore preventing the media such as rainwater from penetrating into and affecting internal electrical connection is a comparatively important Consideration in photovoltaic junction box design. Sealant filling photovoltaic junction box realizes sealing waterproof by encapsulating, is the currently preferred solution. Current sealant filling photovoltaic junction box is identical with common rosette, is all arrange installation cavity between box body, is arranged in installation cavity by diode. Operationally can produce higher temperature due to diode, along with the continuous rising of diode temperature, the resistance in diode will constantly increase, and cause that diode produces more heat, thus wasting more electric power resource to enter vicious cycle. In order to ensure that photovoltaic junction box has better thermal diffusivity, it is generally adopted and increases the method for installation cavity volume in photovoltaic junction box, thus adding thickness and the volume of whole photovoltaic junction box, it is often more important that, adopt and be difficult in this way reach good radiating effect. Therefore, how under the premise reducing photovoltaic junction box volume as far as possible, it is achieved to sealing effectiveness, make sealant filling photovoltaic junction box have excellent heat dissipation ventilation effect simultaneously, have become as the focus of industry research.

Summary of the invention

It is an object of the invention to provide a kind of small-sized sealant filling photovoltaic junction box with high heat dispersion and sealing property; designed by integral heat sink characteristics design and mounting structure; under the premise reducing photovoltaic junction box volume as far as possible; realize sealant filling photovoltaic junction box cross-ventilation, flash heat transfer; reach internal thermal equilibrium and protect diode, making product have higher reliability.

Technical scheme is as follows:

A kind of small-sized sealant filling photovoltaic junction box, including the base mutually covered and upper cover, is provided with base plate, described base plate is provided with multiple terminal, is provided with diode between each terminal in described base; The Line pressing buckle that photovoltaic cable is passed through in base is connected with terminal; Fill above base plate in described base and have fluid sealant;

Described terminal, base plate are distributed in base; Described terminal, base plate adopt heat proof material, and described base adopts nonrefractory material; After described base plate is assemblied in base, the bottom surface of base plate is on different horizontal planes from the bottom surface of base, and the base end face below described base plate has convection cavity; On described base plate, the bottom surface of non-mounting terminal is provided with through hole, and described via bottoms is sealed by pasting boards;

Described base periphery is provided with the coaming plate bending and being perpendicular to base end face along base plate configuration; Described base has the multiple cavitys defined by coaming plate; Described upper cover top surface has projection upwards, and the end face of described upper cover or side have the air vent corresponding with the empty cavity position on base.

Its further technical scheme is: the pin of described diode is welded on adjacent two terminal, and described terminal is installed on base plate, and described base plate is installed on base.

The method have the benefit that:

The present invention is on hot speciality optimizes, most hot spot is made to be not directly contacted with solar energy backboard, base bottom at most hot spot place offers the convection cavity of hollow out, and make base end face and base plate directly form shoulder height difference, the air vent simultaneously passing through above to cover processing makes heat rapid divergence, plays the effect of radiating and cooling; By metalwork has been covered with box body inner chamber, making the area of dissipation after encapsulating bigger, the heat in box body is more evenly distributed; By base periphery being bent to form coaming plate, and forming multiple cavity by coaming plate, while reducing encapsulating amount, making again heat radiation accelerate; By the design of upper lid surface evagination, increase effectively photovoltaic junction box inner space, be also beneficial to the raising of heat dispersion.

Advantages of the present invention provides in the description by detailed description of the invention part below, and part will become apparent from the description below, or is recognized by the practice of the present invention.

Accompanying drawing explanation

Fig. 1 is the exploded view of the present invention.

Fig. 2 is the superstructure figure of the present invention.

Fig. 3 is the base arrangement figure of the present invention.

Fig. 4 is the understructure figure of the present invention.

Fig. 5 is the cut-away view of the present invention.

Fig. 6 is the structure figure of the present invention.

Detailed description of the invention

Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further.

As it is shown in figure 1, the present invention includes the base 5 and the upper cover 1 that mutually cover, base plate 4 is installed in base 5, base plate 4 is provided with difform multiple terminal 3 and multiple diode 2. Seeing Fig. 5, mounting means is installation diode 2 between terminals of adjacent 3. As it is shown in figure 1, two Line pressing buckles 6 are arranged in base 5, two strands of photovoltaic cables 7 are each passed through Line pressing buckle 6 and weld with terminal 3.

As it is shown in figure 5, the two of diode 2 pins are welded on adjacent two terminal 3, terminal 3 is installed on base plate 4, and base plate 4 is installed to again on base 5.

Owing to the present invention is encapsulating type, therefore in base 5, all it is perfused with fluid sealant in space above base plate 4. Seeing Fig. 3, Fig. 6, on base plate 4, the bottom surface of non-mounting terminal 3 is provided with through hole 4-1, seals by pasting boards (not shown) bottom through hole 4-1, and therefore fluid sealant will not flow in the space below through hole 4-1.

As shown in Figure 6, after base plate 4 is assemblied in base 5, the bottom surface of base plate 4 is on different horizontal planes from the bottom surface of base 5, and base 5 bottom surface below base plate 4 has convection cavity 5-1. Wherein, terminal 3, base plate 4 adopt heat proof material, for instance metal; Base 5 adopts nonrefractory material. Such structure, make to form difference in height with base plate 4 bottom the base 5 of photovoltaic junction box, the most serious terminal 3 of box body internal heat generation, base plate 4 position will not direct contact solar backboards, the heat avoided on terminal 3, base plate 4 is quickly transmitted on base 5, thus affecting the solar panel of lower section.

Again as it is shown in figure 5, metalwork terminal 3, base plate 4 are distributed in base 5, covering more than at least 90% base area of base 5 inner chamber, be substantially covered with box body inner chamber, the area of dissipation after such encapsulating is bigger, and the heat in box body is more evenly distributed.

As shown in Figure 4, encirclement to fluid sealant when base 5 periphery is provided with the coaming plate 5-2 bending and being perpendicular to base 5 bottom surface along base plate 4 shape, coaming plate 5-2 for encapsulating. Also having the multiple cavity 5-3 formed after being connected by coaming plate 5-2 on base 5, the position of cavity 5-3, without encapsulating, reduces encapsulating amount, has saved cost, and cavity 5-3 can make heat radiation faster again simultaneously, kills two birds with one stone.

As in figure 2 it is shown, upper cover 1 end face has protruding 1-1 upwards, effectively increase tray interior space, be also beneficial to the raising of heat dispersion; Meanwhile, the end face of upper cover 1 has the air vent 1-2 corresponding with the cavity 5-3 position on base 5 with side; In embodiment, having an air vent 1-2 corresponding with the middle cavity 5-3 position on base 5 in the middle part of the end face of upper cover 1, the side of upper cover 1 has two the air vent 1-2s corresponding with the cavity 5-3 position, both sides on base 5. This structure can form the cross-ventilation inside and outside box body, plays the effect of radiating and cooling.

Above-described is only the preferred embodiment of the present invention, the invention is not restricted to above example. It is appreciated that the oher improvements and changes that those skilled in the art directly derive without departing from the spirit and concept in the present invention or associate, is all considered as being included within protection scope of the present invention.

Claims

1. a small-sized sealant filling photovoltaic junction box, including the base (5) mutually covered and upper cover (1), base plate (4) is installed in described base (5), described base plate (4) is provided with multiple terminal (3), diode (2) is installed between each terminal (3); The Line pressing buckle (6) that photovoltaic cable (7) is passed through in base (5) is connected with terminal (3); Fill in base plate (4) top in described base (5) and have fluid sealant;

It is characterized in that: described terminal (3), base plate (4) are distributed in base (5); Described terminal (3), base plate (4) adopt heat proof material, and described base (5) adopts nonrefractory material; After described base plate (4) is assemblied in base (5), the bottom surface of base plate (4) is on different horizontal planes from the bottom surface of base (5), and base (5) bottom surface of described base plate (4) lower section has convection cavity (5-1); On described base plate (4), the bottom surface of non-mounting terminal (3) is provided with through hole (4-1), and described through hole (4-1) bottom is sealed by pasting boards;

Described base (5) periphery is provided with the coaming plate (5-2) bending and being perpendicular to base (5) bottom surface along base plate (4) shape; Having the multiple cavitys (5-3) defined by coaming plate (5-2) on described base (5), described cavity (5-3) communicates with the external world in the side of coaming plate (5-2);Described upper cover (1) end face has projection (1-1) upwards, described projection (1-1) includes being positioned at the raised bodies directly over diode (2), and a plurality of muscle position being connected with raised bodies, the end face of described upper cover (1) or side have the air vent (1-2) corresponding with cavity (5-3) position on base (5).

2. small-sized sealant filling photovoltaic junction box according to claim 1, it is characterised in that: the pin of described diode (2) is welded on adjacent two terminal (3).